Search results for "PSF"
showing 8 items of 8 documents
Human Factor Interrelationships to Improve Worker Reliability: Implementation of MCDM in the Agri-Food Sector
2023
Performance Shaping Factors (PSFs) are contextual, individual, and cognitive factors used in Human Reliability Analysis (HRA) to quantify the worker contribution to errors when performing a generic task. Although the empirical evidence demonstrates the existence of PSF interrelationships, the majority of HRA methods assume their independence. As a consequence, the resulting Human Error Probability (HEP) might be over- or underestimated. To deal with this issue, only a few qualitative guidelines or statistical-based approaches have been proposed so far. While the former are not well structured, the latter require a high computational effort and a proper number of input data. Therefore, the p…
Preparation of fouling resistant and highly perm-selective novel PSf/GO-vanillin nanofiltration membrane for efficient water purification
2022
International audience; To meet the rising global demand for water, it is necessary to develop membranes capable of efficiently purifying contaminated water sources. Herein, we report a series of novel polysulfone (PSf)/GO-vanillin nanofiltration membranes highly permeable, selective, and fouling resistant. The membranes are composed of two-dimensional (2D) graphite oxide (GO) layers embedded with vanillin as porogen and PSf as the base polymer. There is a growing interest in addressing the synergistic effect of GO and vanillin on improving the permeability and antifouling characteristics of membranes. Various spectroscopic and microscopic techniques were used to perform detailed physicoche…
2015. 2. Por qué celebrar primarias
2015
¿Por qué celebrar primarias? ¿Beneficia o perjudica a las organizaciones y partidos que las promueven?, ¿Mejora la participación?, ¿La elección de los dirigentes evita la oligarquización y la Ley de Hierro de los partidos políticos que enunció Robert Michels? Un sistema de selección de candidatos con origen en la política norteamericana, fue adaptado por el PSOE, y a continuación iría extendiéndose su práctica a los todos los partidos políticos. Ignacio Urquizu señalaba sobre las elecciones primarias, en 2013 que: «Esta experiencia se ha repetido en España en 13 ocasiones más, aunque sólo en el ámbito regional. Únicamente en una ocasión las utilizó el PP y fue en las últimas elecciones auto…
Human error contribution to accidents in the manufacturing sector: A structured approach to evaluate the interdependence among performance shaping fa…
2023
Since the 1970s, Human Reliability Analysis (HRA) methods have received a great interest for the quantification of the Human Error Probability (HEP) in Nuclear Power Plants (NPPs). To this purpose, the second-generation HRA methods consider contextual and cognitive factors - named Performance Shaping Factors (PSFs) - that may influence the workers’ performance during tasks execution. Despite the recent extension of HRA methods to different fields, only few studies refer to the manufacturing sector. In addition, the majority of contributions assume the independence among PSFs, which may result in an over or under estimation of HEP. Therefore, the present paper focuses on the manufacturing se…
Preparation of novel high permeability and antifouling polysulfone-vanillin membrane
2020
International audience; A novel high-performance nanofiltration membrane was fabricated by a simple and scalable route involving in situ cross-linking of hydrophilic, cheap, and environmentally friendly vanillin as antifouling agent with polysulfone (PSf) for salt rejection performance. Vanillin acts as a porogen, which induces a negative surface charge on the membrane surface due to the presence of polar functional groups like alcohol and aldehyde. The surface properties, including charge, morphology, and hydrophilicity, were investigated in detail using analytical instruments. The nanofiltration performance of the fabricated PSf-vanillin membranes was dependent on the percentage of vanill…
A MCDM-based methodology to evaluate the mutual influence among performance shaping factors
2022
In recent decades, risk analysts have widely focused on Human Reliability Analysis (HRA) methods to assess the contribution of human errors to system failures, also considering contextual and cognitive factors named Performance Shaping Factors (PSFs). Initially implemented in the field of Nuclear Power Plants (NNPs), HRA methods have been extended to different sectors in recent years. Despite that, the majority of contributions in the field assume the independence among PSFs, which may result in an over or under estimation of the Human Error Probability (HEP). Therefore, the present paper proposes a DEMATEL-based approach to evaluate the mutual influence between PSFs proposed by the SPARH m…
Bruk av begreper om praksis i NAV/ sosialtjenesten : Likhet og ulikhet i forståelser : Rapport fra HUSK – Agder / delprosjekt 2, våren 2010
2010
Sammendraget kommer til å inngå som en del av kolofonsiden og vil bli satt korrektinn på denne av bibliotektjenesten som i tillegg fyller ut feltene under.. (12 pt)Bakgrunnen for denne rapporten er arbeidet som har pågått i HUSK- Agder,delprosjekt 2; samarbeid sosialtjenesten - NAV, fra 2007-2009. Forfatterne, som beggeer vitenskapelig ansatte ved Universitetet i Agder, har hatt et særlig ansvar forarbeidsprosessen i dette prosjektet. Tittelen på rapporten; ”Bruk av begreper ompraksis i NAV/ sosialtjenesten”, peker mot en tematikk som ble aktualisert isamarbeidet mellom praktikere, brukere og forskere fra UiA i dette delprosjektet.Prosjektet som ble kalt ” Begrepsforståelse hos tjenesteyter…
A computer-assisted experiment to study the influence of the point spread function in the image formation process
2018
[EN] We present a new open experimental setup assisted with LabView to be used to teach the concept of the point spread function (PSF). The PSF describes the response of an image-forming system to a point object. The PSF concept is of fundamental importance in optics since the output of an image-forming system can be simulated as the convolution of the PSF with the input object. In this work, a new graphical user interface has been developed to obtain a real-time measure of the PSF and the corresponding images provided by different lenses and pupils with different sizes and shapes. From a didactical point of view, the proposed method allows students to interpret the results in a visual and …